A 33-year-old male presented to a hospital with complaints of onset of dyspnea, wheezing, and productive cough with blood-tinged sputum from the last 48 hours. The patient denied any personal or family history of pulmonary disorders. He also denied the routine use of tobacco, drugs, or alcohol. The patient is employed as an industrial insulation application specialist.
One day before this consultation, he had unprotected exposure to the maleic anhydride gas cloud. However, he did not report any recent episodes of fever, chills, chest pain, stiffness, nausea, vomiting, diarrhea, or abdominal pain. His laboratory findings of erythrocyte sedimentation rate (ESR), antinuclear antibodies (ANA), and anti-neutrophil cytoplasmic antibody (ANCA) were negative. Pulmonary function testing revealed a forced vital capacity of 3.59 L, forced expiratory volume of 3.10 L, and functional expiration…
